Excerpts from a collection of graphical demonstrations developed for a class in first year calculus in the McAllister Technology Classroom. Derivatives and differentials; Computing the volume of water in a tipped glass; Archimedes' calculation of pi; How the ball bounces; Secants and tangents; Zooming in on a tangent line; A trigonometric limit; The limit; A nowhere differentiable function; 2.71828; The intersection of two cylinders. Includes text, animations, Mathematica files, student worksheets. A newer, Java version of this page is also available online.